fix: resolve multiple frontend/backend bugs and add missing functionality

Backend:
- Fix Decimal serialization in data_explorer.py (Decimal → FloatDecimal)
- Fix Optional type hints for query parameters in admin.py
- Fix authentication bypass in market.py search_stocks endpoint

Frontend:
- Fix 404 page: link to "/" instead of "/dashboard", proper back button
- Rewrite dashboard with real API data instead of hardcoded samples
- Implement actual equity curve and drawdown charts in backtest detail
- Remove mock data from backtest list, load real results from API
- Fix null dividend_yield display in quality strategy page
- Add skeleton loading states to 7 pages that returned null during load

Infrastructure:
- Fix PostgreSQL 18 volume mount compatibility in docker-compose.yml

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/api/admin.py

@@ -1,7 +1,7 @@
 """
 Admin API for data collection management.
 """
-from typing import List
+from typing import List, Optional
 from datetime import datetime
 
 from fastapi import APIRouter, Depends, HTTPException, Query
@@ -45,7 +45,7 @@ class CollectResponse(BaseModel):
 async def collect_stocks(
     current_user: CurrentUser,
     db: Session = Depends(get_db),
-    biz_day: str = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
+    biz_day: Optional[str] = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
 ):
     """Collect stock master data from KRX."""
     try:
@@ -63,7 +63,7 @@ async def collect_stocks(
 async def collect_sectors(
     current_user: CurrentUser,
     db: Session = Depends(get_db),
-    biz_day: str = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
+    biz_day: Optional[str] = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
 ):
     """Collect sector classification data from WISEindex."""
     try:
@@ -81,8 +81,8 @@ async def collect_sectors(
 async def collect_prices(
     current_user: CurrentUser,
     db: Session = Depends(get_db),
-    start_date: str = Query(None, pattern=r"^\d{8}$", description="Start date in YYYYMMDD format"),
+    start_date: Optional[str] = Query(None, pattern=r"^\d{8}$", description="Start date in YYYYMMDD format"),
-    end_date: str = Query(None, pattern=r"^\d{8}$", description="End date in YYYYMMDD format"),
+    end_date: Optional[str] = Query(None, pattern=r"^\d{8}$", description="End date in YYYYMMDD format"),
 ):
     """Collect price data using pykrx."""
     try:
@@ -100,7 +100,7 @@ async def collect_prices(
 async def collect_valuations(
     current_user: CurrentUser,
     db: Session = Depends(get_db),
-    biz_day: str = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
+    biz_day: Optional[str] = Query(None, pattern=r"^\d{8}$", description="Business day in YYYYMMDD format"),
 ):
     """Collect valuation data from KRX."""
     try:
@@ -135,8 +135,8 @@ async def collect_etfs(
 async def collect_etf_prices(
     current_user: CurrentUser,
     db: Session = Depends(get_db),
-    start_date: str = Query(None, pattern=r"^\d{8}$", description="Start date in YYYYMMDD format"),
+    start_date: Optional[str] = Query(None, pattern=r"^\d{8}$", description="Start date in YYYYMMDD format"),
-    end_date: str = Query(None, pattern=r"^\d{8}$", description="End date in YYYYMMDD format"),
+    end_date: Optional[str] = Query(None, pattern=r"^\d{8}$", description="End date in YYYYMMDD format"),
 ):
     """Collect ETF price data using pykrx."""
     try:

backend/app/api/data_explorer.py

@@ -2,7 +2,6 @@
 Data explorer API endpoints for viewing collected stock/ETF data.
 """
 from datetime import date
-from decimal import Decimal
 from typing import Optional, List
 
 from fastapi import APIRouter, Depends, Query
@@ -13,6 +12,7 @@ from pydantic import BaseModel
 from app.core.database import get_db
 from app.api.deps import CurrentUser
 from app.models.stock import Stock, ETF, Price, ETFPrice, Sector, Valuation
+from app.schemas.portfolio import FloatDecimal
 
 router = APIRouter(prefix="/api/data", tags=["data-explorer"])
 
@@ -30,7 +30,7 @@ class StockItem(BaseModel):
     ticker: str
     name: str
     market: str
-    close_price: Decimal | None = None
+    close_price: FloatDecimal | None = None
     market_cap: int | None = None
 
     class Config:
@@ -42,7 +42,7 @@ class ETFItem(BaseModel):
     name: str
     asset_class: str
     market: str
-    expense_ratio: Decimal | None = None
+    expense_ratio: FloatDecimal | None = None
 
     class Config:
         from_attributes = True
@@ -50,10 +50,10 @@ class ETFItem(BaseModel):
 
 class PriceItem(BaseModel):
     date: date
-    open: Decimal | None = None
+    open: FloatDecimal | None = None
-    high: Decimal | None = None
+    high: FloatDecimal | None = None
-    low: Decimal | None = None
+    low: FloatDecimal | None = None
-    close: Decimal
+    close: FloatDecimal
     volume: int | None = None
 
     class Config:
@@ -62,8 +62,8 @@ class PriceItem(BaseModel):
 
 class ETFPriceItem(BaseModel):
     date: date
-    close: Decimal
+    close: FloatDecimal
-    nav: Decimal | None = None
+    nav: FloatDecimal | None = None
     volume: int | None = None
 
     class Config:
@@ -83,11 +83,11 @@ class SectorItem(BaseModel):
 class ValuationItem(BaseModel):
     ticker: str
     base_date: date
-    per: Decimal | None = None
+    per: FloatDecimal | None = None
-    pbr: Decimal | None = None
+    pbr: FloatDecimal | None = None
-    psr: Decimal | None = None
+    psr: FloatDecimal | None = None
-    pcr: Decimal | None = None
+    pcr: FloatDecimal | None = None
-    dividend_yield: Decimal | None = None
+    dividend_yield: FloatDecimal | None = None
 
     class Config:
         from_attributes = True

backend/app/api/market.py

@@ -87,8 +87,8 @@ async def get_stock_prices(
 
 @router.get("/search", response_model=List[StockSearchResult])
 async def search_stocks(
+    current_user: CurrentUser,
     q: str = Query(..., min_length=1),
-    current_user: CurrentUser = None,
     db: Session = Depends(get_db),
     limit: int = Query(default=20, ge=1, le=100),
 ):

docker-compose.yml

@@ -7,7 +7,7 @@ services:
       POSTGRES_PASSWORD: ${DB_PASSWORD:-devpassword}
       POSTGRES_DB: ${DB_NAME:-galaxy_po}
     volumes:
-      - postgres_data:/var/lib/postgresql/data
+      - postgres_data:/var/lib/postgresql
     ports:
       - "5432:5432"
     healthcheck:

frontend/src/app/admin/data/explorer/page.tsx

@@ -140,7 +140,17 @@ export default function DataExplorerPage() {
 
   const totalPages = data ? Math.ceil(data.total / data.size) : 0;
 
-  if (loading) return null;
+  if (loading) {
+    return (
+      <DashboardLayout>
+        <div className="flex items-center justify-between mb-6">
+          <div className="h-8 w-48 bg-muted animate-pulse rounded" />
+          <div className="h-10 w-28 bg-muted animate-pulse rounded" />
+        </div>
+        <div className="h-96 bg-muted animate-pulse rounded-xl" />
+      </DashboardLayout>
+    );
+  }
 
   return (
     <DashboardLayout>

frontend/src/app/backtest/[id]/page.tsx

@@ -5,6 +5,7 @@ import { useRouter, useParams } from 'next/navigation';
 import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Label } from '@/components/ui/label';
+import { AreaChart } from '@/components/charts/area-chart';
 import { api } from '@/lib/api';
 
 interface BacktestMetrics {
@@ -287,24 +288,49 @@ export default function BacktestDetailPage() {
               <CardTitle>자산 추이</CardTitle>
             </CardHeader>
             <CardContent>
-              <div className="h-64 flex items-center justify-center text-muted-foreground">
+              {equityCurve.length > 0 ? (
-                {equityCurve.length > 0 ? (
+                <AreaChart
-                  <div className="w-full">
+                  data={equityCurve.map((p) => ({
-                    <div className="flex justify-between text-sm text-muted-foreground mb-2">
+                    date: p.date,
-                      <span>시작: {formatCurrency(equityCurve[0]?.portfolio_value || 0)}원</span>
+                    value: p.portfolio_value,
-                      <span>종료: {formatCurrency(equityCurve[equityCurve.length - 1]?.portfolio_value || 0)}원</span>
+                    benchmark: p.benchmark_value,
-                    </div>
+                  }))}
-                    <div className="text-center text-muted-foreground">
+                  height={280}
-                      (차트 라이브러리 연동 필요 - {equityCurve.length}개 데이터 포인트)
+                  color="#3b82f6"
-                    </div>
+                  showLegend={false}
-                  </div>
+                  formatValue={(v) => `${formatCurrency(v)}원`}
-                ) : (
+                  formatXAxis={(v) => v.slice(5)}
-                  '데이터 없음'
+                />
-                )}
+              ) : (
-              </div>
+                <div className="h-64 flex items-center justify-center text-muted-foreground">
+                  데이터 없음
+                </div>
+              )}
             </CardContent>
           </Card>
 
+          {/* Drawdown Chart */}
+          {equityCurve.some((p) => p.drawdown !== 0) && (
+            <Card className="mb-6">
+              <CardHeader>
+                <CardTitle>낙폭 (Drawdown)</CardTitle>
+              </CardHeader>
+              <CardContent>
+                <AreaChart
+                  data={equityCurve.map((p) => ({
+                    date: p.date,
+                    value: p.drawdown,
+                  }))}
+                  height={200}
+                  color="#ef4444"
+                  showLegend={false}
+                  formatValue={(v) => `${v.toFixed(1)}%`}
+                  formatXAxis={(v) => v.slice(5)}
+                />
+              </CardContent>
+            </Card>
+          )}
+
           {/* Tabs */}
           <Card>
             <div className="border-b border-border">

frontend/src/app/backtest/page.tsx

@@ -18,7 +18,6 @@ import {
   SelectValue,
 } from '@/components/ui/select';
 import { AreaChart } from '@/components/charts/area-chart';
-import { BarChart } from '@/components/charts/bar-chart';
 import { api } from '@/lib/api';
 import { TrendingUp, TrendingDown, Activity, Target, Calendar, Settings } from 'lucide-react';
 
@@ -34,9 +33,14 @@ interface BacktestResult {
   cagr: number | null;
   mdd: number | null;
   sharpe_ratio?: number | null;
+  result?: {
+    sharpe_ratio: number | null;
+    total_return: number | null;
+    cagr: number | null;
+    mdd: number | null;
+  } | null;
   equity_curve?: Array<{ date: string; value: number }>;
   drawdown_curve?: Array<{ date: string; value: number }>;
-  yearly_returns?: Array<{ name: string; value: number }>;
 }
 
 interface BacktestListItem {
@@ -65,58 +69,13 @@ const periodOptions = [
   { value: 'annual', label: '연별' },
 ];
 
-// Mock result for demonstration when no real backtest result available
-const mockResult: BacktestResult = {
-  id: 0,
-  strategy_type: 'multi_factor',
-  start_date: '2020-01-01',
-  end_date: '2024-12-31',
-  rebalance_period: 'quarterly',
-  status: 'completed',
-  created_at: new Date().toISOString(),
-  total_return: 87.5,
-  cagr: 13.4,
-  mdd: -24.6,
-  sharpe_ratio: 0.92,
-  equity_curve: [
-    { date: '2020-01', value: 100000000 },
-    { date: '2020-06', value: 95000000 },
-    { date: '2021-01', value: 115000000 },
-    { date: '2021-06', value: 128000000 },
-    { date: '2022-01', value: 142000000 },
-    { date: '2022-06', value: 125000000 },
-    { date: '2023-01', value: 148000000 },
-    { date: '2023-06', value: 162000000 },
-    { date: '2024-01', value: 175000000 },
-    { date: '2024-06', value: 187500000 },
-  ],
-  drawdown_curve: [
-    { date: '2020-01', value: 0 },
-    { date: '2020-06', value: -12.5 },
-    { date: '2021-01', value: -2.1 },
-    { date: '2021-06', value: 0 },
-    { date: '2022-01', value: -5.2 },
-    { date: '2022-06', value: -24.6 },
-    { date: '2023-01', value: -8.3 },
-    { date: '2023-06', value: -3.1 },
-    { date: '2024-01', value: -1.5 },
-    { date: '2024-06', value: 0 },
-  ],
-  yearly_returns: [
-    { name: '2020', value: 15.0 },
-    { name: '2021', value: 23.5 },
-    { name: '2022', value: -12.0 },
-    { name: '2023', value: 28.4 },
-    { name: '2024', value: 22.1 },
-  ],
-};
 
 export default function BacktestPage() {
   const router = useRouter();
   const [loading, setLoading] = useState(true);
   const [submitting, setSubmitting] = useState(false);
   const [backtests, setBacktests] = useState<BacktestListItem[]>([]);
-  const [currentResult] = useState<BacktestResult | null>(null);
+  const [currentResult, setCurrentResult] = useState<BacktestResult | null>(null);
   const [error, setError] = useState<string | null>(null);
   const [showHistory, setShowHistory] = useState(false);
 
@@ -157,6 +116,29 @@ export default function BacktestPage() {
     try {
       const data = await api.get<BacktestListItem[]>('/api/backtest');
       setBacktests(data);
+
+      // Load the latest completed backtest for display
+      const latestCompleted = data.find((bt) => bt.status === 'completed');
+      if (latestCompleted) {
+        try {
+          const detail = await api.get<BacktestResult>(`/api/backtest/${latestCompleted.id}`);
+          const [equityCurve] = await Promise.all([
+            api.get<Array<{ date: string; portfolio_value: number; drawdown: number }>>(`/api/backtest/${latestCompleted.id}/equity-curve`),
+          ]);
+
+          setCurrentResult({
+            ...detail,
+            total_return: latestCompleted.total_return,
+            cagr: latestCompleted.cagr,
+            mdd: latestCompleted.mdd,
+            sharpe_ratio: detail.result?.sharpe_ratio ?? null,
+            equity_curve: equityCurve.map((p) => ({ date: p.date, value: p.portfolio_value })),
+            drawdown_curve: equityCurve.map((p) => ({ date: p.date, value: p.drawdown })),
+          });
+        } catch {
+          // Detail fetch failed, show list only
+        }
+      }
     } catch (err) {
       console.error('Failed to fetch backtests:', err);
     }
@@ -240,8 +222,7 @@ export default function BacktestPage() {
     }).format(value);
   };
 
-  // Use mock data for demonstration
+  const displayResult = currentResult;
-  const displayResult = currentResult || mockResult;
 
   if (loading) {
     return (
@@ -584,124 +565,117 @@ export default function BacktestPage() {
 
           {/* Right Side - Results */}
           <div className="lg:col-span-3 space-y-6">
-            {/* Summary Cards */}
+            {displayResult ? (
-            <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+              <>
+                {/* Summary Cards */}
+                <div className="grid grid-cols-2 md:grid-cols-4 gap-4">
+                  <Card>
+                    <CardContent className="p-4">
+                      <div className="flex items-center gap-2 text-muted-foreground mb-1">
+                        <TrendingUp className="h-4 w-4" />
+                        <span className="text-xs font-medium">CAGR</span>
+                      </div>
+                      <p className={`text-2xl font-bold ${(displayResult.cagr ?? 0) >= 0 ? 'text-green-600' : 'text-red-600'}`}>
+                        {formatNumber(displayResult.cagr)}%
+                      </p>
+                    </CardContent>
+                  </Card>
+
+                  <Card>
+                    <CardContent className="p-4">
+                      <div className="flex items-center gap-2 text-muted-foreground mb-1">
+                        <TrendingDown className="h-4 w-4" />
+                        <span className="text-xs font-medium">MDD</span>
+                      </div>
+                      <p className="text-2xl font-bold text-red-600">
+                        {formatNumber(displayResult.mdd)}%
+                      </p>
+                    </CardContent>
+                  </Card>
+
+                  <Card>
+                    <CardContent className="p-4">
+                      <div className="flex items-center gap-2 text-muted-foreground mb-1">
+                        <Activity className="h-4 w-4" />
+                        <span className="text-xs font-medium">샤프 비율</span>
+                      </div>
+                      <p className="text-2xl font-bold">
+                        {formatNumber(displayResult.sharpe_ratio)}
+                      </p>
+                    </CardContent>
+                  </Card>
+
+                  <Card>
+                    <CardContent className="p-4">
+                      <div className="flex items-center gap-2 text-muted-foreground mb-1">
+                        <Target className="h-4 w-4" />
+                        <span className="text-xs font-medium">총 수익률</span>
+                      </div>
+                      <p className={`text-2xl font-bold ${(displayResult.total_return ?? 0) >= 0 ? 'text-green-600' : 'text-red-600'}`}>
+                        {formatNumber(displayResult.total_return)}%
+                      </p>
+                    </CardContent>
+                  </Card>
+                </div>
+
+                {/* Equity Curve */}
+                <Card>
+                  <CardHeader>
+                    <CardTitle className="text-base">자산 추이</CardTitle>
+                  </CardHeader>
+                  <CardContent>
+                    {displayResult.equity_curve && displayResult.equity_curve.length > 0 ? (
+                      <AreaChart
+                        data={displayResult.equity_curve}
+                        height={280}
+                        color="#3b82f6"
+                        showLegend={false}
+                        formatValue={(v) => formatCurrency(v)}
+                        formatXAxis={(v) => v.slice(5)}
+                      />
+                    ) : (
+                      <div className="flex items-center justify-center h-64 bg-muted/50 rounded-lg">
+                        <p className="text-muted-foreground">차트 데이터가 없습니다</p>
+                      </div>
+                    )}
+                  </CardContent>
+                </Card>
+
+                {/* Drawdown Chart */}
+                <Card>
+                  <CardHeader>
+                    <CardTitle className="text-base">낙폭 (Drawdown)</CardTitle>
+                  </CardHeader>
+                  <CardContent>
+                    {displayResult.drawdown_curve && displayResult.drawdown_curve.length > 0 ? (
+                      <AreaChart
+                        data={displayResult.drawdown_curve}
+                        height={200}
+                        color="#ef4444"
+                        showLegend={false}
+                        formatValue={(v) => `${v.toFixed(1)}%`}
+                        formatXAxis={(v) => v.slice(5)}
+                      />
+                    ) : (
+                      <div className="flex items-center justify-center h-48 bg-muted/50 rounded-lg">
+                        <p className="text-muted-foreground">데이터가 없습니다</p>
+                      </div>
+                    )}
+                  </CardContent>
+                </Card>
+              </>
+            ) : (
               <Card>
-                <CardContent className="p-4">
+                <CardContent className="p-12">
-                  <div className="flex items-center gap-2 text-muted-foreground mb-1">
+                  <div className="flex flex-col items-center justify-center text-center text-muted-foreground">
-                    <TrendingUp className="h-4 w-4" />
+                    <Activity className="h-12 w-12 mb-4 text-muted-foreground/30" />
-                    <span className="text-xs font-medium">CAGR</span>
+                    <h3 className="text-lg font-medium mb-2">백테스트 결과가 없습니다</h3>
+                    <p className="text-sm mb-1">좌측에서 전략을 설정하고 백테스트를 실행하세요.</p>
+                    <p className="text-xs">완료된 백테스트의 결과가 여기에 표시됩니다.</p>
                   </div>
-                  <p className={`text-2xl font-bold ${(displayResult.cagr ?? 0) >= 0 ? 'text-green-600' : 'text-red-600'}`}>
-                    {formatNumber(displayResult.cagr)}%
-                  </p>
                 </CardContent>
               </Card>
-
+            )}
-              <Card>
-                <CardContent className="p-4">
-                  <div className="flex items-center gap-2 text-muted-foreground mb-1">
-                    <TrendingDown className="h-4 w-4" />
-                    <span className="text-xs font-medium">MDD</span>
-                  </div>
-                  <p className="text-2xl font-bold text-red-600">
-                    {formatNumber(displayResult.mdd)}%
-                  </p>
-                </CardContent>
-              </Card>
-
-              <Card>
-                <CardContent className="p-4">
-                  <div className="flex items-center gap-2 text-muted-foreground mb-1">
-                    <Activity className="h-4 w-4" />
-                    <span className="text-xs font-medium">샤프 비율</span>
-                  </div>
-                  <p className="text-2xl font-bold">
-                    {formatNumber(displayResult.sharpe_ratio)}
-                  </p>
-                </CardContent>
-              </Card>
-
-              <Card>
-                <CardContent className="p-4">
-                  <div className="flex items-center gap-2 text-muted-foreground mb-1">
-                    <Target className="h-4 w-4" />
-                    <span className="text-xs font-medium">총 수익률</span>
-                  </div>
-                  <p className={`text-2xl font-bold ${(displayResult.total_return ?? 0) >= 0 ? 'text-green-600' : 'text-red-600'}`}>
-                    {formatNumber(displayResult.total_return)}%
-                  </p>
-                </CardContent>
-              </Card>
-            </div>
-
-            {/* Equity Curve */}
-            <Card>
-              <CardHeader>
-                <CardTitle className="text-base">자산 추이</CardTitle>
-              </CardHeader>
-              <CardContent>
-                {displayResult.equity_curve ? (
-                  <AreaChart
-                    data={displayResult.equity_curve}
-                    height={280}
-                    color="#3b82f6"
-                    showLegend={false}
-                    formatValue={(v) => formatCurrency(v)}
-                    formatXAxis={(v) => v}
-                  />
-                ) : (
-                  <div className="flex items-center justify-center h-64 bg-muted/50 rounded-lg">
-                    <p className="text-muted-foreground">백테스트를 실행하면 결과가 표시됩니다</p>
-                  </div>
-                )}
-              </CardContent>
-            </Card>
-
-            {/* Drawdown Chart */}
-            <Card>
-              <CardHeader>
-                <CardTitle className="text-base">낙폭 (Drawdown)</CardTitle>
-              </CardHeader>
-              <CardContent>
-                {displayResult.drawdown_curve ? (
-                  <AreaChart
-                    data={displayResult.drawdown_curve}
-                    height={200}
-                    color="#ef4444"
-                    showLegend={false}
-                    formatValue={(v) => `${v.toFixed(1)}%`}
-                    formatXAxis={(v) => v}
-                  />
-                ) : (
-                  <div className="flex items-center justify-center h-48 bg-muted/50 rounded-lg">
-                    <p className="text-muted-foreground">데이터가 없습니다</p>
-                  </div>
-                )}
-              </CardContent>
-            </Card>
-
-            {/* Yearly Returns */}
-            <Card>
-              <CardHeader>
-                <CardTitle className="text-base">연간 수익률</CardTitle>
-              </CardHeader>
-              <CardContent>
-                {displayResult.yearly_returns ? (
-                  <BarChart
-                    data={displayResult.yearly_returns}
-                    height={250}
-                    layout="vertical"
-                    colorByValue={true}
-                    formatValue={(v) => `${v.toFixed(1)}%`}
-                  />
-                ) : (
-                  <div className="flex items-center justify-center h-48 bg-muted/50 rounded-lg">
-                    <p className="text-muted-foreground">데이터가 없습니다</p>
-                  </div>
-                )}
-              </CardContent>
-            </Card>
           </div>
         </div>
       )}

frontend/src/app/not-found.tsx

@@ -1,9 +1,14 @@
+'use client';
+
 import Link from 'next/link';
+import { useRouter } from 'next/navigation';
 import { Button } from '@/components/ui/button';
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card';
 import { FileQuestion, Home, ArrowLeft } from 'lucide-react';
 
 export default function NotFound() {
+  const router = useRouter();
+
   return (
     <div className="flex min-h-screen items-center justify-center bg-background p-4">
       <Card className="w-full max-w-md text-center">
@@ -22,16 +27,14 @@ export default function NotFound() {
           </p>
           <div className="flex flex-col gap-2 sm:flex-row sm:justify-center">
             <Button asChild>
-              <Link href="/dashboard">
+              <Link href="/">
                 <Home className="mr-2 h-4 w-4" />
                 대시보드로 이동
               </Link>
             </Button>
-            <Button variant="outline" asChild>
+            <Button variant="outline" onClick={() => router.back()}>
-              <Link href="javascript:history.back()">
+              <ArrowLeft className="mr-2 h-4 w-4" />
-                <ArrowLeft className="mr-2 h-4 w-4" />
+              뒤로 가기
-                뒤로 가기
-              </Link>
             </Button>
           </div>
         </CardContent>

frontend/src/app/page.tsx

@@ -1,97 +1,39 @@
 'use client';
 
+import { useEffect, useState } from 'react';
+import { useRouter } from 'next/navigation';
+import Link from 'next/link';
 import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
-import { Sparkline, AreaChart, DonutChart, BarChart } from '@/components/charts';
+import { DonutChart } from '@/components/charts';
 import { Wallet, TrendingUp, Briefcase, RefreshCw } from 'lucide-react';
+import { api } from '@/lib/api';
 
-// Sample data for sparklines
+interface HoldingWithValue {
-const totalAssetSparkline = [
+  ticker: string;
-  { value: 9500000 },
+  current_ratio: number | null;
-  { value: 9800000 },
+  value: number | null;
-  { value: 10000000 },
+  profit_loss_ratio: number | null;
-  { value: 9700000 },
+}
-  { value: 10200000 },
-  { value: 10500000 },
-  { value: 10800000 },
-];
 
-const returnSparkline = [
+interface PortfolioDetail {
-  { value: 2.5 },
+  id: number;
-  { value: 3.1 },
+  name: string;
-  { value: 2.8 },
+  portfolio_type: string;
-  { value: 4.2 },
+  total_value: number | null;
-  { value: 5.1 },
+  total_invested: number | null;
-  { value: 4.8 },
+  total_profit_loss: number | null;
-  { value: 5.5 },
+  holdings: HoldingWithValue[];
-];
+}
 
-// Sample data for asset trend chart
+interface PortfolioSummary {
-const assetTrendData = [
+  id: number;
-  { date: '2024-01', value: 10000000 },
+  name: string;
-  { date: '2024-02', value: 10500000 },
+  portfolio_type: string;
-  { date: '2024-03', value: 10200000 },
+}
-  { date: '2024-04', value: 10800000 },
-  { date: '2024-05', value: 11200000 },
-  { date: '2024-06', value: 11000000 },
-  { date: '2024-07', value: 11500000 },
-  { date: '2024-08', value: 12000000 },
-  { date: '2024-09', value: 11800000 },
-  { date: '2024-10', value: 12500000 },
-  { date: '2024-11', value: 13000000 },
-  { date: '2024-12', value: 13500000 },
-];
 
-// Sample data for sector allocation
+const CHART_COLORS = [
-const sectorData = [
+  '#3b82f6', '#8b5cf6', '#10b981', '#f59e0b', '#ef4444', '#06b6d4',
-  { name: '기술', value: 40, color: '#3b82f6' },
-  { name: '금융', value: 30, color: '#10b981' },
-  { name: '헬스케어', value: 20, color: '#f59e0b' },
-  { name: '기타', value: 10, color: '#6b7280' },
-];
-
-// Sample data for portfolio comparison
-const portfolioComparisonData = [
-  { name: '포트폴리오 A', value: 12.5 },
-  { name: '포트폴리오 B', value: 8.3 },
-  { name: '포트폴리오 C', value: -2.1 },
-  { name: 'KOSPI', value: 5.7 },
-  { name: 'S&P 500', value: 15.2 },
-];
-
-const summaryCards = [
-  {
-    title: '총 자산',
-    value: '₩135,000,000',
-    description: '전체 포트폴리오 가치',
-    icon: Wallet,
-    sparklineData: totalAssetSparkline,
-    sparklineColor: '#3b82f6',
-  },
-  {
-    title: '총 수익률',
-    value: '+35.0%',
-    description: '전체 수익률',
-    icon: TrendingUp,
-    sparklineData: returnSparkline,
-    sparklineColor: '#10b981',
-  },
-  {
-    title: '포트폴리오',
-    value: '3',
-    description: '활성 포트폴리오 수',
-    icon: Briefcase,
-    sparklineData: null,
-    sparklineColor: null,
-  },
-  {
-    title: '리밸런싱',
-    value: '2',
-    description: '예정된 리밸런싱',
-    icon: RefreshCw,
-    sparklineData: null,
-    sparklineColor: null,
-  },
 ];
 
 const formatKRW = (value: number) => {
@@ -99,128 +41,257 @@ const formatKRW = (value: number) => {
     return `${(value / 100000000).toFixed(1)}억`;
   }
   if (value >= 10000) {
-    return `${(value / 10000).toFixed(0)}만`;
+    return `${Math.round(value / 10000)}만`;
   }
   return value.toLocaleString();
 };
 
-const formatPercent = (value: number) => `${value.toFixed(1)}%`;
-
 export default function DashboardPage() {
+  const router = useRouter();
+  const [loading, setLoading] = useState(true);
+  const [portfolios, setPortfolios] = useState<PortfolioDetail[]>([]);
+
+  useEffect(() => {
+    const init = async () => {
+      try {
+        await api.getCurrentUser();
+        const summaries = await api.get<PortfolioSummary[]>('/api/portfolios');
+
+        const details = await Promise.all(
+          summaries.map(async (p) => {
+            try {
+              return await api.get<PortfolioDetail>(`/api/portfolios/${p.id}/detail`);
+            } catch {
+              return {
+                ...p,
+                total_value: null,
+                total_invested: null,
+                total_profit_loss: null,
+                holdings: [],
+              } as PortfolioDetail;
+            }
+          })
+        );
+        setPortfolios(details);
+      } catch {
+        router.push('/login');
+      } finally {
+        setLoading(false);
+      }
+    };
+    init();
+  }, [router]);
+
+  if (loading) {
+    return null; // DashboardLayout handles skeleton
+  }
+
+  const totalValue = portfolios.reduce((sum, p) => sum + (p.total_value ?? 0), 0);
+  const totalInvested = portfolios.reduce((sum, p) => sum + (p.total_invested ?? 0), 0);
+  const totalProfitLoss = portfolios.reduce((sum, p) => sum + (p.total_profit_loss ?? 0), 0);
+  const totalReturnPercent = totalInvested > 0 ? (totalProfitLoss / totalInvested) * 100 : 0;
+
+  // Aggregate holdings for donut chart
+  const allHoldings = portfolios.flatMap((p) => p.holdings);
+  const holdingsByTicker: Record<string, number> = {};
+  for (const h of allHoldings) {
+    if (h.value && h.value > 0) {
+      holdingsByTicker[h.ticker] = (holdingsByTicker[h.ticker] ?? 0) + h.value;
+    }
+  }
+  const donutData = Object.entries(holdingsByTicker)
+    .sort((a, b) => b[1] - a[1])
+    .slice(0, 6)
+    .map(([ticker, value], i) => ({
+      name: ticker,
+      value: totalValue > 0 ? (value / totalValue) * 100 : 0,
+      color: CHART_COLORS[i % CHART_COLORS.length],
+    }));
+
+  // Add "기타" if there are more holdings
+  const topValue = donutData.reduce((s, d) => s + d.value, 0);
+  if (topValue < 100 && topValue > 0) {
+    donutData.push({ name: '기타', value: 100 - topValue, color: '#6b7280' });
+  }
+
+  // Portfolio comparison data
+  const portfolioComparison = portfolios
+    .filter((p) => p.total_invested && p.total_invested > 0)
+    .map((p) => ({
+      name: p.name,
+      value: ((p.total_profit_loss ?? 0) / (p.total_invested ?? 1)) * 100,
+    }));
+
   return (
     <DashboardLayout>
       <div className="space-y-6">
         {/* Summary Cards */}
         <div className="grid gap-4 md:grid-cols-2 lg:grid-cols-4">
-          {summaryCards.map((card) => {
-            const Icon = card.icon;
-            return (
-              <Card key={card.title}>
-                <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
-                  <CardTitle className="text-sm font-medium">
-                    {card.title}
-                  </CardTitle>
-                  <Icon className="h-4 w-4 text-muted-foreground" />
-                </CardHeader>
-                <CardContent>
-                  <div className="text-2xl font-bold">{card.value}</div>
-                  <p className="text-xs text-muted-foreground">
-                    {card.description}
-                  </p>
-                  {card.sparklineData && (
-                    <Sparkline
-                      data={card.sparklineData}
-                      color={card.sparklineColor || '#3b82f6'}
-                      height={32}
-                      className="mt-2"
-                    />
-                  )}
-                </CardContent>
-              </Card>
-            );
-          })}
-        </div>
-
-        {/* Main Charts */}
-        <div className="grid gap-4 md:grid-cols-2">
           <Card>
-            <CardHeader>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
-              <CardTitle>포트폴리오 성과</CardTitle>
+              <CardTitle className="text-sm font-medium">총 자산</CardTitle>
+              <Wallet className="h-4 w-4 text-muted-foreground" />
             </CardHeader>
             <CardContent>
-              <AreaChart
+              <div className="text-2xl font-bold">
-                data={assetTrendData}
+                {totalValue > 0 ? `₩${formatKRW(totalValue)}` : '-'}
-                height={280}
+              </div>
-                color="#3b82f6"
+              <p className="text-xs text-muted-foreground">전체 포트폴리오 가치</p>
-                formatValue={formatKRW}
-                showLegend={false}
-              />
             </CardContent>
           </Card>
 
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+              <CardTitle className="text-sm font-medium">총 수익률</CardTitle>
+              <TrendingUp className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className={`text-2xl font-bold ${totalReturnPercent >= 0 ? 'text-green-600' : 'text-red-600'}`}>
+                {totalInvested > 0 ? `${totalReturnPercent >= 0 ? '+' : ''}${totalReturnPercent.toFixed(1)}%` : '-'}
+              </div>
+              <p className="text-xs text-muted-foreground">
+                {totalProfitLoss !== 0 ? `${totalProfitLoss >= 0 ? '+' : ''}₩${formatKRW(Math.abs(totalProfitLoss))}` : '투자 후 확인 가능'}
+              </p>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+              <CardTitle className="text-sm font-medium">포트폴리오</CardTitle>
+              <Briefcase className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">{portfolios.length}</div>
+              <p className="text-xs text-muted-foreground">활성 포트폴리오 수</p>
+            </CardContent>
+          </Card>
+
+          <Card>
+            <CardHeader className="flex flex-row items-center justify-between space-y-0 pb-2">
+              <CardTitle className="text-sm font-medium">총 종목 수</CardTitle>
+              <RefreshCw className="h-4 w-4 text-muted-foreground" />
+            </CardHeader>
+            <CardContent>
+              <div className="text-2xl font-bold">{Object.keys(holdingsByTicker).length}</div>
+              <p className="text-xs text-muted-foreground">보유 중인 종목</p>
+            </CardContent>
+          </Card>
+        </div>
+
+        {/* Main Content */}
+        <div className="grid gap-4 md:grid-cols-2">
+          {/* Asset Allocation */}
           <Card>
             <CardHeader>
               <CardTitle>자산 배분</CardTitle>
             </CardHeader>
             <CardContent>
-              <DonutChart
+              {donutData.length > 0 ? (
-                data={sectorData}
+                <DonutChart
-                height={280}
+                  data={donutData}
-                innerRadius={50}
+                  height={280}
-                outerRadius={90}
+                  innerRadius={50}
-              />
+                  outerRadius={90}
+                />
+              ) : (
+                <div className="flex items-center justify-center h-64 text-muted-foreground">
+                  <div className="text-center">
+                    <p className="mb-2">보유 종목이 없습니다</p>
+                    <Link href="/portfolio" className="text-primary hover:underline text-sm">
+                      포트폴리오 관리하기
+                    </Link>
+                  </div>
+                </div>
+              )}
+            </CardContent>
+          </Card>
+
+          {/* Portfolio List */}
+          <Card>
+            <CardHeader>
+              <CardTitle>포트폴리오 현황</CardTitle>
+            </CardHeader>
+            <CardContent>
+              {portfolios.length > 0 ? (
+                <div className="space-y-4">
+                  {portfolios.map((p) => {
+                    const returnPct = p.total_invested && p.total_invested > 0
+                      ? ((p.total_profit_loss ?? 0) / p.total_invested) * 100
+                      : null;
+                    return (
+                      <Link key={p.id} href={`/portfolio/${p.id}`} className="block">
+                        <div className="flex items-center justify-between p-3 rounded-lg bg-muted/50 hover:bg-muted transition-colors">
+                          <div className="flex-1">
+                            <div className="flex items-center gap-2">
+                              <p className="text-sm font-medium">{p.name}</p>
+                              <span className={`text-xs px-1.5 py-0.5 rounded ${
+                                p.portfolio_type === 'pension'
+                                  ? 'bg-purple-100 text-purple-800 dark:bg-purple-900 dark:text-purple-200'
+                                  : 'bg-muted text-muted-foreground'
+                              }`}>
+                                {p.portfolio_type === 'pension' ? '퇴직연금' : '일반'}
+                              </span>
+                            </div>
+                            <p className="text-xs text-muted-foreground mt-1">
+                              {p.holdings.length}개 종목
+                            </p>
+                          </div>
+                          <div className="text-right">
+                            <p className="text-sm font-medium">
+                              {p.total_value ? `₩${formatKRW(p.total_value)}` : '-'}
+                            </p>
+                            {returnPct !== null && (
+                              <p className={`text-xs ${returnPct >= 0 ? 'text-green-600' : 'text-red-600'}`}>
+                                {returnPct >= 0 ? '+' : ''}{returnPct.toFixed(1)}%
+                              </p>
+                            )}
+                          </div>
+                        </div>
+                      </Link>
+                    );
+                  })}
+                </div>
+              ) : (
+                <div className="flex items-center justify-center h-64 text-muted-foreground">
+                  <div className="text-center">
+                    <Briefcase className="h-8 w-8 mx-auto mb-2 text-muted-foreground/50" />
+                    <p className="mb-2">아직 포트폴리오가 없습니다</p>
+                    <Link href="/portfolio/new" className="text-primary hover:underline text-sm">
+                      첫 포트폴리오 만들기
+                    </Link>
+                  </div>
+                </div>
+              )}
             </CardContent>
           </Card>
         </div>
 
-        {/* Secondary Charts */}
+        {/* Portfolio Comparison */}
-        <div className="grid gap-4 md:grid-cols-2">
+        {portfolioComparison.length > 1 && (
           <Card>
             <CardHeader>
-              <CardTitle>포트폴리오 비교</CardTitle>
+              <CardTitle>포트폴리오 수익률 비교</CardTitle>
-            </CardHeader>
-            <CardContent>
-              <BarChart
-                data={portfolioComparisonData}
-                height={240}
-                layout="horizontal"
-                formatValue={formatPercent}
-                colorByValue={true}
-              />
-            </CardContent>
-          </Card>
-
-          <Card>
-            <CardHeader>
-              <CardTitle>알림</CardTitle>
             </CardHeader>
             <CardContent>
               <div className="space-y-3">
-                <div className="flex items-center gap-3 p-3 rounded-lg bg-muted/50">
+                {portfolioComparison.map((p, i) => (
-                  <RefreshCw className="h-4 w-4 text-blue-500" />
+                  <div key={i} className="flex items-center gap-4">
-                  <div className="flex-1">
+                    <span className="text-sm w-32 truncate">{p.name}</span>
-                    <p className="text-sm font-medium">리밸런싱 예정</p>
+                    <div className="flex-1 bg-muted rounded-full h-4 overflow-hidden">
-                    <p className="text-xs text-muted-foreground">포트폴리오 A - 2일 후</p>
+                      <div
+                        className={`h-full rounded-full ${p.value >= 0 ? 'bg-green-500' : 'bg-red-500'}`}
+                        style={{ width: `${Math.min(Math.abs(p.value), 100)}%` }}
+                      />
+                    </div>
+                    <span className={`text-sm font-medium w-16 text-right ${p.value >= 0 ? 'text-green-600' : 'text-red-600'}`}>
+                      {p.value >= 0 ? '+' : ''}{p.value.toFixed(1)}%
+                    </span>
                   </div>
-                </div>
+                ))}
-                <div className="flex items-center gap-3 p-3 rounded-lg bg-muted/50">
-                  <TrendingUp className="h-4 w-4 text-green-500" />
-                  <div className="flex-1">
-                    <p className="text-sm font-medium">목표 수익률 달성</p>
-                    <p className="text-xs text-muted-foreground">포트폴리오 B - 오늘</p>
-                  </div>
-                </div>
-                <div className="flex items-center gap-3 p-3 rounded-lg bg-muted/50">
-                  <Briefcase className="h-4 w-4 text-amber-500" />
-                  <div className="flex-1">
-                    <p className="text-sm font-medium">배당금 입금</p>
-                    <p className="text-xs text-muted-foreground">삼성전자 - 3일 후</p>
-                  </div>
-                </div>
               </div>
             </CardContent>
           </Card>
-        </div>
+        )}
       </div>
     </DashboardLayout>
   );

frontend/src/app/portfolio/[id]/page.tsx

@@ -9,6 +9,7 @@ import { Button } from '@/components/ui/button';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { TradingViewChart } from '@/components/charts/trading-view-chart';
 import { DonutChart } from '@/components/charts/donut-chart';
+import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
 import type { AreaData, Time } from 'lightweight-charts';
 
@@ -169,7 +170,20 @@ export default function PortfolioDetailPage() {
   };
 
   if (loading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <div className="flex justify-between items-center mb-6">
+          <Skeleton className="h-8 w-48" />
+          <Skeleton className="h-10 w-28" />
+        </div>
+        <div className="grid grid-cols-1 md:grid-cols-4 gap-4 mb-6">
+          {Array.from({ length: 4 }).map((_, i) => (
+            <Skeleton key={i} className="h-24 rounded-xl" />
+          ))}
+        </div>
+        <Skeleton className="h-80 rounded-xl" />
+      </DashboardLayout>
+    );
   }
 
   const chartData = portfolio ? generateChartData(portfolio.total_value) : [];

frontend/src/app/portfolio/page.tsx

@@ -6,6 +6,7 @@ import Link from 'next/link';
 import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { Button } from '@/components/ui/button';
 import { PortfolioCard } from '@/components/portfolio/portfolio-card';
+import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
 
 interface HoldingWithValue {
@@ -87,7 +88,19 @@ export default function PortfolioListPage() {
   };
 
   if (loading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <div className="flex justify-between items-center mb-6">
+          <Skeleton className="h-8 w-40" />
+          <Skeleton className="h-10 w-32" />
+        </div>
+        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
+          {Array.from({ length: 3 }).map((_, i) => (
+            <Skeleton key={i} className="h-48 rounded-xl" />
+          ))}
+        </div>
+      </DashboardLayout>
+    );
   }
 
   return (

frontend/src/app/strategy/multi-factor/page.tsx

@@ -7,6 +7,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
+import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
 
 interface StockFactor {
@@ -95,7 +96,12 @@ export default function MultiFactorPage() {
   };
 
   if (initialLoading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <Skeleton className="h-8 w-48 mb-6" />
+        <Skeleton className="h-48 rounded-xl" />
+      </DashboardLayout>
+    );
   }
 
   return (

frontend/src/app/strategy/page.tsx

@@ -5,6 +5,7 @@ import { useRouter } from 'next/navigation';
 import { DashboardLayout } from '@/components/layout/dashboard-layout';
 import { StrategyCard } from '@/components/strategy/strategy-card';
 import { api } from '@/lib/api';
+import { Skeleton } from '@/components/ui/skeleton';
 import { BarChart3, Star, TrendingUp } from 'lucide-react';
 
 const strategies = [
@@ -55,7 +56,19 @@ export default function StrategyListPage() {
   }, [router]);
 
   if (loading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <div className="mb-6">
+          <Skeleton className="h-8 w-40 mb-2" />
+          <Skeleton className="h-4 w-64" />
+        </div>
+        <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
+          {Array.from({ length: 3 }).map((_, i) => (
+            <Skeleton key={i} className="h-64 rounded-xl" />
+          ))}
+        </div>
+      </DashboardLayout>
+    );
   }
 
   return (

frontend/src/app/strategy/quality/page.tsx

@@ -7,6 +7,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
+import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
 
 interface StockFactor {
@@ -86,7 +87,12 @@ export default function QualityStrategyPage() {
   };
 
   if (initialLoading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <Skeleton className="h-8 w-48 mb-6" />
+        <Skeleton className="h-48 rounded-xl" />
+      </DashboardLayout>
+    );
   }
 
   return (
@@ -174,7 +180,7 @@ export default function QualityStrategyPage() {
                       <td className="px-4 py-3 text-sm text-right">{formatCurrency(stock.close_price)}</td>
                       <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.per)}</td>
                       <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.pbr)}</td>
-                      <td className="px-4 py-3 text-sm text-right">{formatNumber(stock.dividend_yield)}%</td>
+                      <td className="px-4 py-3 text-sm text-right">{stock.dividend_yield !== null ? `${formatNumber(stock.dividend_yield)}%` : '-'}</td>
                       <td className="px-4 py-3 text-center">
                         <span className={`px-2 py-1 rounded text-xs ${
                           (stock.fscore ?? 0) >= 8 ? 'bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-200' :

frontend/src/app/strategy/value-momentum/page.tsx

@@ -7,6 +7,7 @@ import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
 import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
+import { Skeleton } from '@/components/ui/skeleton';
 import { api } from '@/lib/api';
 
 interface StockFactor {
@@ -89,7 +90,12 @@ export default function ValueMomentumPage() {
   };
 
   if (initialLoading) {
-    return null;
+    return (
+      <DashboardLayout>
+        <Skeleton className="h-8 w-48 mb-6" />
+        <Skeleton className="h-48 rounded-xl" />
+      </DashboardLayout>
+    );
   }
 
   return (